Several months after the manga's ending, Jujustu Kaisen creator finally unravels the truth behind Gojo's death.

During the Hidden Inventory Arc, Gojo fought Toji Fushigoro to protect Amanai from getting assassinated. During this fight, Gojo considered Toji Fushigoro dead after using the cursed technique Blue.

Even with Gojo’s relative inexperience ... It’s simple, efficient world-building. The same is true of Heavenly Restrictions, and Maki and Toji’s parallel-but-ultimately-distinct struggles ...